Car-wheel.



f` fr. M. GREPAR.

4CAR WHEEL. i APPLICATION FILED FEB. 14, 1909.'

' Patented Sept. 22, 1908,

/J IAA ,Q 9 2.77 61% UNITED sTATEs' NPATENT oEEIoE.

THOMAS MORTIMER CREPAR', OF FARGO, NORTH DAKOTA, ASSIGN f y GEORGE JOHN HAHN, OF MOORHEAD, MINNESOTA, AND ONE-FOURTH TO SHELDONv F.

CORNELL, OF FARGO, NORTH DAKOTA.

cnn-WHEEL.

specification of Letters Patent. Application :Bled February 14, 1908. Serial No. 415,820.

Iatented Sept. 22, 1908.

To all 'whom it may concern.'

. Be it known that I, THOMAS MORTIMER EPAR, a citizen-of the United States,and a resident of Fargo, in the county of Cass and- State ofNorth Dakota, have invented a new and Improved Car-Wheel, of which the following 1s va full, clear, and exact description.

This invention relates to car wheels,and more 'particularly car wheels each of which includes a hub section and revoluble lthereupon a rim section, the sections being formed with race ways therebetween in which are arranged bearin balls or rollers held in position by face pates upon the sections, and also forming raceways.

" The object of the invention is to provide a simple,D strong and mex adapted to be mounted w1th another similar wheel rigidlyA u means for ment of each Wheel rlm in rounding cl'rves. `A further object of thel invention 1s to provide a car wheel adapted to be mounted with another similar y s ing a hub section ri id with the axle and a rim section carried by the hub section and movable relatively thereto, bearing balls or rollers being interposed between the sections. -The invention consists in the construction and combination of parts to be more fully depona car axle, and having scribed hereinafter and particularly pointed out in thel claims.

Reference is to be had tothe accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views, and in which Figure 1 represents a part of a car axle whic h as a journal at one end mounted in al journal box, and shows in vertical section a car wheel of my invention mounted thereupon; and Fig. 2 is a side elevation, Vpartly in section on the line 2 2 of Fig. 1.. J 4

'Before `proceeding to a more'detailed explanation of my invention, it should be understood that railroad and other cars are usually mounted upon lwheels carried in pairs upon suitable axles, one wheel being independent movement `of the ri ldly mounted at each end. of the axle w ich presents a journal on the outside of the wheel arranged in a Suitable journal-box. As both wheels of the pair on thfr axle are rigid with the axle thereis no possibility of Wheels with ensive car wheel permitting the independent movewheel uponan axle, vand havrounding a curve there 1s considerable wear uplon the wheels owing to the fact that the w eel atthe outside ofthe curve must travel faster than the wheel at vthe inside "of the curve, and as the outer'wheel cannot revolve faster than the inner Wheel. a certain amount of sliding isinevitable. It is held that this disadvantage is offset by the advantage of being able inmanufacturing to shrink the Wheels firmly 'upon the axle.

In myinvention I provide a hub section shrunk or otherwise suitably mounted upon the axle at an end thereof and rigidfwith the same. The Vrim section is revolubly located upon the hub section and is free to move with respect thereto, being carried upon bearing balls or rollers arranged in suitable race-Ways and interposed between the wheel sections. Theaxle has the usual journal at the outside of the wheel, which is adapted to be revolubly mounted in a journal-box ofpreferred or common form. ment the rim sections of the wheels ends of the axle at the can revolve at different rates with. respect to one another and to the axle, and thereby the speed of revolution in rounding curves adjusts itself automatically to the location of the wheels at the inner or outer the greater part ofthe wear incident to the vsliding of` one wheel orthe other upon the rail is obviated and at the same time the axle itself can revolve in the journals, and this additional revoluble mounting increases the iiexibility of the change in the relative rates of revolution of the wheels and the axle. Owing. to the interposition. of the bearing balls o r rollers between the wheel sections, the friction between the rim section andthe i hub section will be less than that between the journal and the j ournalbrasses; conse uently, under normal conditions the axle wil not revolve in its bearings and ythus the Wear of the bearing brasses is avoided. Furthermore, the bearings cannot heat and there is for this reason no danger of hot boxes and fires due to ignited waste and oil in the journal boxes.

eferring more particularl to the drawings, 1 -represents a car axle of the' usual type aving mounted thereupon at one end a wheel hub section 2. The hub section 2 is preferably shrunk upon the axle in the usual 1 manner. The axle 1 is extended beyond the 0E 0E ONE-FOURTH To v`respect to .one another; consequently, in

sides of the curve, respectively. In thisway By means of this arrangehub section 2, in the form of a journal 3 of the ordinary type and adapted to be mounted in a' journal-box 4 carried by the car-trame. The hubV section 2 has the usual inner hub extension 6, and is provided at the opposite peripheral edges with annular 'grooves 7, preferably curved inthe quadrant ot a circle. A rim section 8 is mounted concentrically upon fthe hub section 2 and is spaced a slight distance'therefrom. The rim section 8 has a vWheel rim 9ct the usual form, provided with a tread 10'and a flange 11, At the inner edges of the rim section are formed annular grooves 12, preferably in the form of a qu adrant oi a circle, and registering with the grooves 7 of the hub section. The adjacent .respectively on the outer and inner faces of the hub section 2, and have annular ilanges 16 and 17 res ectively, curved in the form of a quadrant o a circle and extending over the race-'Way formed by the grooves 7 and 12.

Annular face plates 18 and 19 are mounted on the inner and-outer faces respectively of the'rim section 8', and have annular flanges 20 and 21 respectively, curved ina quadrant of'a circle andextending over the race-way 1 presentedA by the wheel sections. The adjacent flanges of the face plates form semicircular race-ways, registering with the corresp'ondingrace-ways presented by the 'sections vof the wheel and serve to hold the bearin /gballs in position.` The face plates are `hed in position by means of bolts 22 and nuts 23, passing through suitable openings in the face plates and wheel sections.

As the face plates are removable, the bearing balls or rollers between the Wheel sections can be easily replaced when wornor broken, by simply removing the face plates at one side of the wheel, the tace plates performing the further ottico of holding Vthe wheel sections in proper' position, one upon the other, through their' engagement with the rollers which also engage lboth sections of the wheel, as will be clearly understood lfrom the description and the drawings.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A car Wheel, comprising a hub section, a rim-section thereupon, said sections having registering grooves forming a raceway, a removable face plate upon each of said sections, said plates having outwardly curved flanges presenting registering grooves constituting a raceway extending over said first iaceway, and bearing rollers between said raceways.

2. A car wheel comprising a hub section adapted to be rigidly mounted upon a revoluble axle, said hub section havin0r an annular groove, a rim section upon said hub section and having an annular groove registering with said first groove and forming therewith a race-way, bearing rollers in said raceway, and face plates removably mounted upon said hub section and said rim section respectively, and extending over said race way to hold said rollers in position therewithin.

3. A car wheel comprising a hub section adapted to be rigidly mounted upon an axle having a journal, said journal belng ada ted to be revolubly mounted in a 'ournalox, said hub section having an annular groove at an edge thereot, a rim section upon said hub section and having an annular groove registering with said iirst groove and formin1r therewith a race-way, bearing rollers in said race-way, and face plates removably mounted respectively, upon said sections, and having flanges extending over said race-way, and constitutingtogether a second race-way engaging said rollers to hold the same in psition.

4. A car wheel comprisinga hub section adapted to be rigidly mounted upon an axle having a journal, said journal beingada ted to be revolubly mounted in a journal ox, said hub section having annular grooves at opposite peripheral edges, a rim section upon said hub section and having annular grooves at the inner edges thereof, said grooves of said rim section registering with said grooves of said hub'section and forming therewith race-ways, bearing rollers in said race-ways, andface plates removably mounted upon said hub section and said rim section at the opposite sides thereof and having flanges, adjacent flanges ot said face lates constituting race-ways serving to ho d said rollers in position.

In testimony whereof l. have signed Vmy name to this specification in the presence of vtwo subscribing witnesses.

THOMAS MORTIMER CREPAR. Witnesses:

H. 1. Lonen, MARJORY HARDY. 

